What does the Doppler effect at baseball game measure

True or False: Newton's Second Law of Motion states acceleration depends on the objects mass and on the force acting on the object.

A student, standing on a scale in an elevator at rest, sees that his weight is 997 N. As the elevator rises, the scale reads 1226 N and then returns to normal.

When making an offset in conduit, if the spacing between marks is double the offset depth, you know that the offset angle is?

Why have forest fires in ponderosa pine forests become more damaging to that ecosystem than they were historically?

When the total amount of a quantity is the same before and after some event occurs, we say that the quantity is (blank)

A slow jogger runs a mile in 16 minutes. Calculate the speed in

Protecting his nest, a 600-g peregrine falcon rams a marauding 1.5-kg raven in midair. the falcon is moving at 20.0 m/s, and the raven at 9.00 m/s at the moment of impact.

A carousel has a radius of 1.70 m and a moment of inertia of 110 kg · m2. A girl of mass 44.0 kg is standing at the edge of the carousel, which is rotating with an angular speed of 3.40 rad/s.

A 2kg marble is moving at 3 m/s when it strikes another 4kg marble moving in the opposite direction at - 3 m/s. What will be the velocity of the 4kg marble after the collision of the 2kg marble's new velocity is - 4 m/s.

How long did it take to reload a rifle during the 18th 19 century?